CN118022889A - Material pre-pressurizing device with automatic deviation correcting function, material stabilizing bin and method - Google Patents

Abstract

The invention belongs to the technical field of material stabilizing bins, and particularly relates to a material pre-pressurizing device with an automatic deviation correcting function, a material stabilizing bin and a method, wherein the material pre-pressurizing device is arranged between the bottom of the material stabilizing bin and a roller press and is used for exhausting materials from the material stabilizing bin and feeding the materials into the roller press; the outer side of the material pre-pressurizing device is provided with a box body; the box body is provided with a feeding port communicated with the stable bin body, and the feeding port is positioned right above an extrusion channel formed by the pressure roller and the inner wall of the box body; the material pre-pressurizing device comprises a pre-pressurizing power structure, a pressurizing roller and a pressurizing mechanism; the pre-pressurizing power structure is used for driving the pressurizing roller to rotate; the pressing mechanism is arranged at one side of the pressing roller far away from the feeding hole and is used for providing horizontal pressure towards the inner wall of the box body for the pressing roller; the pressing roller continuously engages the material into a pressing passage formed between the pressing roller and the inner wall of the case under the pressure provided by the pressing mechanism to pre-press the material. The invention effectively prevents the roll squeezer from generating air vibration and simultaneously is beneficial to improving the effective acting of the roll squeezer.

Description

Material pre-pressurizing device with automatic deviation correcting function, material stabilizing bin and method

Technical Field

The patent relates to the technical field of material stabilizing bins, in particular to a material pre-pressurizing device with an automatic deviation correcting function, a material stabilizing bin and a method.

Background

The roller press is a high-efficiency energy-saving grinding device, adopts an advanced material layer grinding principle, and can form a plurality of micro cracks in the non-crushed particles when crushing materials, so that the grindability of the materials is improved, and therefore, the roller press is widely applied to raw material and cement grinding.

In the grinding process of raw materials and cement, the materials are required to be circularly extruded for a plurality of times by a roller press to form a final finished product. The higher the fineness index of the finished product is, the more the circulation times of the material in the roller press are, and the circulating material with high fine powder content is mixed with the new feed and then fed into the roller press again for extrusion. In order to ensure the continuity and stability of feeding of the roller press, a stabilizing bin is usually arranged to be matched with the roller press. In actual production, the particle size composition distribution of the material discharged from the stabilizing bin along the width direction of the roller press has a great influence on the running stability of the roller press.

The new feed and the circulating materials with different fine powder contents are not pre-mixed before entering the stabilizing bin, so that the thickness of the materials in the bin is uneven, the granularity composition distribution of the materials discharged from the stabilizing bin along the width direction of the roller press is inconsistent, the flowability of the fine materials is high, the passing speed of the roller gap is high, the material throughput in unit time is constant, and the width of the roller gap at one side of the fine materials is smaller than that of one end of the coarse materials, so that the roller deflection phenomenon of the roller press is caused. The problem of deflection caused by uneven feeding granularity distribution of the roller press not only can reduce the grinding efficiency of the roller press on materials, but also can easily cause the problems of uneven wear of roller surfaces, inclined shaft system movement and the like, and the service life of equipment is influenced.

When the roll gap deviation of the roll squeezer is too large, the roll gap deviation is reduced by increasing the roll pressure on the side with larger roll gap or reducing the roll pressure on the side with smaller roll gap in industry, but the material on the side with smaller pressure cannot be sufficiently ground by the method, so that the grinding effect is poor.

Because the materials in the stable material bin are piled up only by self gravity, a large amount of air exists among the particles, when the roll squeezer squeezes and grinds the materials, the volume of the materials is quickly contracted to form a cake, if the gas can not be timely discharged, the roll squeezer can generate gas vibration, the stable and effective work of the roll squeezer is influenced, the ground foundation of the roll squeezer can be damaged when serious, particularly when the content of fine particles in the materials is more, the gas is less easy to exhaust, and the probability of gas vibration is also higher.

Patent CN115007269B discloses a material adjusting system of a roller press, which comprises a weighing steady flow bin, a discharging mechanism, a compacting exhaust mechanism and a feeding box; the compaction exhaust mechanism drives the material pressing plate to do reciprocating rotation motion around the fixed shaft through the telescopic motion of the hydraulic cylinder, and the material passing through the material pressing plate is extruded in a reciprocating mode, so that air in the material is discharged, the material is pressurized in advance, and the working efficiency of the roller press is improved. In summary, the problems of the prior art are:

(1) When the roll gap deviation of the roll squeezer is large, no effective adjusting means exists, and the roll gap deviation is eliminated by adjusting rolling, so that the working efficiency of the roll squeezer can be influenced.

(2) Before the material enters the roller press, the material is piled up by the gravity of the material, a large amount of air exists among loose particles, and the air vibration easily caused by the roller press is not timely discharged when high-pressure air is instantaneously applied, so that the running stability of a grinding system of the roller press is affected.

(3) In the prior art, an intermittent pressurizing mode is adopted, after one pressurizing action is completed, the volume of a material channel is increased along with the return of a material pressing plate to an initial position, the material which is pressurized and exhausted can be loosened to a certain extent, the pre-pressurizing effect is poor, and when the material pressing plate is at the initial position, part of the material only passes through the material pressing plate and is not pressurized.

(4) When the prior art pressurizes the material, the reduction of material passageway volume can produce the hindrance to the decline of material, makes the roll squeezer throughput reduce in unit time, influences production efficiency.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a material pre-pressurizing device with an automatic deviation correcting function, a material stabilizing bin and a method, wherein the material distribution condition of a roller press is adjusted by adopting a roller gap intelligent deviation correcting control method, so that the phenomenon of deflection of the roller press is effectively avoided and adjusted, the high-efficiency and stable work of the roller press is ensured, the service life of the roller press is prolonged, and the equipment maintenance cost is reduced.

The invention is realized by the following technical scheme:

The material pre-pressurizing device with the automatic deviation correcting function is arranged between the bottom of the stabilizing bin and the roller press and is used for feeding the materials from the stabilizing bin into the roller press after extrusion and exhaust;

The outer side of the material pre-pressurizing device is provided with a box body; the box body is provided with a feed inlet communicated with the stable bin body with an automatic deviation correcting function, and the feed inlet is positioned right above an extrusion channel formed by the pressure roller and the inner wall of the box body; the material pre-pressurizing device comprises a pre-pressurizing power structure, a pressurizing roller and a pressurizing mechanism; the pre-pressurizing power structure is used for driving the pressurizing roller to rotate; the pressing mechanism is arranged at one side of the pressing roller far away from the feeding hole and is used for providing horizontal pressure towards the inner wall of the box body for the pressing roller; the pressing roller continuously engages the material into a pressing passage formed between the pressing roller and the inner wall of the case under the pressure provided by the pressing mechanism to pre-press the material.

Further, the pre-pressurizing power structure comprises a pre-pressurizing variable frequency motor and a pre-pressurizing speed reducer which are matched; the pressing roller comprises a roller sleeve and a roller shaft which are sleeved together, two ends of the roller shaft are fixed in bearing seats on two sides of the roller sleeve, one end, close to the pre-pressurizing variable frequency motor, of the roller shaft is connected with a pre-pressurizing speed reducer, and the pre-pressurizing variable frequency motor is connected with the pre-pressurizing speed reducer through a universal coupling; the pre-pressurizing speed reducer is connected with the hinged support of the torque force supporting mechanism of the speed reducer through a connecting rod.

Further, the pressurizing mechanism comprises an electrohydraulic push rod perpendicular to the roll shaft, an oil pipe and an electrohydraulic push rod hinged support; the electrohydraulic push rod hinged support is fixed on the bearing seat, one end of the electrohydraulic push rod is horizontally fixed on the bearing frame, and the other end of the electrohydraulic push rod is movably connected with the electrohydraulic push rod hinged support and is opposite to the roll shaft; the oil pipe is connected to the interface of the pressurizing mechanism in a threaded manner; a guide key vertically arranged is connected below the bearing seat, and a guide groove matched with the guide key is arranged on the bearing frame; the guide key comprises a guide rod fixed in the bearing seat and a disc type guide seat fixed at the bottom of the guide rod, and the guide seat moves or rotates in a straight line in the guide groove so as to drive the guide rod and the bearing seat to move or rotate.

Further, a plurality of bearing plates are arranged on the outer side of the inner wall of the box body for extruding materials, and a bearing plate support is arranged below the bearing plates.

Further, the box body is connected with the end part of the roll shaft, a kidney-shaped hole in the horizontal direction is formed in the connecting part, and the roll shaft can horizontally move or rotate in the kidney-shaped hole, so that the bearing seat and the pressure roller are driven to horizontally move or rotate; the box body below the waist-shaped hole is provided with a return hole, and materials falling out of the waist-shaped hole return to the material pre-pressurizing device through the return hole.

Further, be equipped with limit flitch below the impression roller, the bottom of keeping away from pressurization mechanism one side is vertical limit flitch, limit flitch downwardly extending to the discharge gate, form between limit flitch and the box inner wall with lie in the pay-off space under the extrusion passageway, this pay-off space is compatible with the material size after the pre-pressurization, the material after the pre-pressurization gets into the roll squeezer through the discharge gate and pressurizes.

Further, the width of the discharge hole is larger than the width between the limiting plate and the inner wall of the box body.

Further, a bottom plate is obliquely arranged right below the pressing roller, a gap exists between the material limiting plate and the bottom plate, and materials passing through gaps between the pressing roller and the box bodies on the two sides and above the pressing roller are mixed with the pre-pressed materials again through the gap and discharged out of the bin together through the discharge hole.

A material stabilizing bin comprises the material pre-pressurizing device with an automatic deviation correcting function.

The invention also discloses a working method of the material pre-pressurizing device with the automatic deviation correcting function, which comprises the following steps:

S1, uniformly dropping the materials to be ground into the horizontal section of the stabilizing bin;

S2, when the material enters the box body from a feed inlet above the pressing roller and contacts the pressing roller, the pressing roller continuously engages the material between the pressing roller and the inner wall of the box body by utilizing the friction force between the roller surface and the material, the material is pre-pressed, and a large amount of air between the materials is discharged;

S3, adjusting the pre-pressurizing strength by adjusting the stroke of the electro-hydraulic push rod of the pressurizing mechanism, and simultaneously adjusting the rotating speed of the pre-pressurizing variable frequency motor to adjust the falling speed of the material;

And S4, when the roller press stabilizing bin works, the roller press roller gap deviation is calculated in real time by utilizing a roller press roller gap online measuring sensor, a data signal of the deviation is transmitted to the controller, and the controller controls the propelling stroke of the electro-hydraulic push rod through calculation.

Further, the material pre-pressurizing device has a roll gap automatic deviation correcting function: when the roll squeezer stabilizing bin works, roll squeezer roll gap deviation is calculated in real time by using a roll squeezer roll gap online measurement sensor, a data signal of the deviation is transmitted to the controller, and the controller controls the propelling stroke of the electro-hydraulic push rod through calculation.

Further, when the roll gap deviation at the two ends of the roll squeezer exceeds the upper limit value allowed by normal operation, the electro-hydraulic push rods automatically adjust the stroke of the push rods according to the command sent by the controller, the feeding quantity of the roll squeezer at the side with the larger roll gap is forcefully reduced, the feeding quantity of the roll squeezer at the side with the smaller roll gap is increased, and when the roll gap deviation is recovered to be normal, the electro-hydraulic push rods at the two sides automatically recover to adjust the front stroke.

Further, setting the upper limit of the absolute value of the roll gap difference between the left roll and the right roll of the roll squeezer as amm; when the roll gap deviation value is smaller than a, the strokes of the two electro-hydraulic push rods are consistent, and the strokes of the left electro-hydraulic push rod and the right electro-hydraulic push rod are bmm; when the roll gap deviation value is larger than a, if the roll gap at the left side of the roll press is larger than the roll gap at the right side, the travel of the electro-hydraulic push rod at the left side of the pre-pressurizing device is increased by cmm, and the travel of the electro-hydraulic push rod at the right side is reduced by d mm; if the left side roll gap of the roll squeezer is smaller than the right side roll gap, the travel of the right side electro-hydraulic push rod of the material pre-pressurizing device is increased by cmm, the travel of the left side hydraulic push rod is reduced by d mm, and when the roll gap deviation value is smaller than a, the travel of the left and right electro-hydraulic push rods is restored to bmm.

The invention has the advantages and technical effects that:

1) The continuous pressurizing mode is adopted, the material passing through the pressurizing roller is pre-pressurized and exhausted, the volume of a material channel in the pressurizing area is constant, the loosening phenomenon of the material can not occur, and the pre-pressurizing effect of the material is more stable;

the rotating speed of the pressing roller can be adjusted steplessly, the efficiency of material meshing and discharging can be improved by utilizing the friction force of the moving roller facing the material, the blocking effect of material channel volume reduction on material descending is counteracted, and the throughput of the roller press in unit time is maintained;

The rotating pressure roller can be utilized to simultaneously realize the roll gap adjusting function of the roll squeezer, so that the phenomenon of deflection of the roll is effectively avoided;

2) The material pre-pressurizing device with the automatic roll gap correcting function is arranged to extrude most of the gas in the loose material, the roll gap deviation of the roll press can be calculated in real time by utilizing the roll gap online measuring sensor of the roll press, the data signal of the deviation is transmitted to the controller, and the controller controls the stroke of the electro-hydraulic push rod through calculation; effectively prevent that the roll squeezer from taking place the gas to shake and help improving the effective acting of roll squeezer simultaneously.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a stabilizing bin of the invention;

FIG. 2 is a schematic structural view of a distributing device and a rotary multi-channel distributing device according to the present invention;

FIG. 3 is a schematic view of a material pre-pressurizing device according to the present invention;

FIG. 4 is a rear view of FIG. 3;

FIG. 5 is a schematic view showing the structure of a pressing roller according to the present invention;

FIG. 6 is a schematic view of the structure of the pressurizing mechanism according to the present invention;

FIG. 7 is a schematic view showing the connection of the pressing roller and the pressing mechanism of the present invention;

FIG. 8 is a schematic diagram of the material pre-pressurizing operation of the present invention;

FIG. 9 is a schematic diagram of the structure of the case of the present invention;

FIG. 10 is a schematic diagram of the normal operation of the roll gap of the present invention;

fig. 11 is a schematic diagram of the roll gap deviation correcting operation of the present invention.

In the figure: 11. a stable bin barrel; 12. a material stabilizing bin cone; 13. a cylinder support; 2. a rotary multi-channel material distribution device; 3. a material pre-pressurizing device; 31. pre-pressurizing a variable frequency motor; 32. a universal coupling; 33. a pre-pressurizing speed reducer; 34. a torsion supporting mechanism of the speed reducer; 341. a hinged support; 342. a connecting rod; 35. a pressing roller; 351. a roller sleeve; 352. a roll shaft; 36. a bearing seat; 361. a bearing bracket; 37. a guide key; 38. a pressurizing mechanism; 381. an electro-hydraulic push rod; 382. an oil pipe; 383. the electrohydraulic push rod is hinged with the support; 39. a case; 391. a feed back hole; 392. a material limiting plate; 393. a pressure bearing plate; 394. a bearing plate is supported; 395. an exhaust port; 396. a bottom plate; 397. a feed inlet; 4. feeding a chute; 5. dividing a material scraper; 6. a manhole door; 7. a dust collection port; 8. a discharge port; 9. a bin top reinforcing rib; 10. and (5) material.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present patent will be described in further detail with reference to the following examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the present patent.

As shown in fig. 1-11, the invention discloses a material pre-pressurizing and stabilizing bin with an automatic deviation correcting function, which comprises a stabilizing bin body, a distributing device arranged on the top of the bin, a rotary multi-channel distributing device 2 and a material pre-pressurizing device 3 arranged at the bottom of the bin; the materials to be ground are uniformly dispersed into a stable bin body 1 of the roller press through a material separating device and a rotary multi-channel material distributing device 2, are fed into the roller press at the bottom of the stable bin after being extruded and exhausted through a material pre-pressurizing device 3, and meanwhile, the stable bin keeps a certain material level height so as to meet the stable operation of the roller press.

As shown in fig. 1, a manhole door 6 is arranged on the top of the stable bin body so as to be convenient for observing the conditions in the stable bin and the access of overhauling personnel, and a dust collection hole 7 is arranged for timely discharging dust in the stable bin; the upper surface of the bin top is crosswise provided with a plurality of bin top reinforcing ribs 9, so that the bearing position of the device is ensured to have enough strength.

The stable bin body comprises a stable bin cylinder 11, a stable bin cone 12 and a cylinder support 13, wherein the stable bin cylinder 11 is positioned at the upper end of the stable bin body, and the cylinder support 13 is arranged on the outer wall of the lower end of the stable bin cylinder 11 and used for fixedly supporting the stable bin; the material stabilizing cone 12 arranged at the lower end of the material stabilizing cylinder 11 is convenient for conveying evenly dispersed materials to be ground to the opening of the material pre-pressurizing device 3.

As shown in fig. 3 to 11, the material pre-pressurizing device 3 comprises a pre-pressurizing variable frequency motor 31 and a pre-pressurizing speed reducer 33 which are matched, and also comprises a pressurizing roller 35, a bearing seat 36 and a pressurizing mechanism 38;

The pre-pressurizing variable frequency motor 31 and the pre-pressurizing speed reducer 33 drive the pressurizing roller 35 to rotate, pre-pressurizing is performed on the continuously engaged material, and the pre-pressurizing strength is adjusted by the pressurizing mechanism 38 according to the requirement. Preferably, the pressing roller 35 comprises a roller sleeve 351 and a roller shaft 352 which are sleeved together, two ends of the roller shaft 352 are fixed in bearing seats 36 on two sides of the roller sleeve 351, one end of the roller shaft 352, which is close to the pre-pressurizing variable frequency motor 31, is connected with the pre-pressurizing speed reducer 33, and the pre-pressurizing variable frequency motor 31 is connected with the pre-pressurizing speed reducer 33 through a universal coupling 32; the pre-pressurizing speed reducer 33 is connected with the hinged support 341 of the speed reducer torsion support mechanism 34 through a connecting rod 342.

Further preferably, the pressurizing roller 35 is provided with pressurizing mechanisms 38 at two sides, and the pressurizing mechanisms 38 comprise an electro-hydraulic push rod 381, an oil pipe 382 and an electro-hydraulic push rod hinged support 383 which are perpendicular to the roller shaft 352; the electrohydraulic push rod hinged support 383 is fixed on the bearing seat 36, one end of the electrohydraulic push rod 381 is horizontally fixed on the bearing frame 361, and the other end is movably connected with the electrohydraulic push rod hinged support 383 and is opposite to the roll shaft 352; the oil pipe 382 is threaded to the interface of the pressurizing mechanism 38 to ensure proper operation and safety of the hydraulic system. A guide key 37 vertically arranged is connected below the bearing seat 36, and a guide groove matched with the guide key is arranged on the bearing frame 361; the guide key comprises a guide rod fixed in the bearing seat and a disc type guide seat fixed at the bottom of the guide rod, and the guide seat moves or rotates in a straight line in the guide groove so as to drive the guide rod and the bearing seat to move or rotate.

Preferably, as shown in fig. 8 to 9, a box 39 is disposed outside the material pre-pressurizing device 3, and the box 39 includes a feed back hole 391, a material limiting plate 392, a bearing plate 393, a bearing plate support 394, an air outlet 395, a bottom plate 396 and a feed inlet 397 communicated with the material stabilizing bin body; the feed inlet 397 is arranged at the top of the box body and is positioned right above an extrusion channel formed by the pressure roller and the inner wall of the box body; the pressing mechanism is arranged at one side of the pressing roller far away from the feeding hole and is used for providing horizontal pressure towards the inner wall of the box body for the pressing roller; when the material in the bin body of the material stabilizing bin enters from the material inlet 397 above the pressing roller 35 and then contacts the pressing roller 35, the pressing roller 35 continuously engages the material into an extrusion channel formed between the pressing roller 35 and the inner wall of the bin body by utilizing the friction force between the roller surface and the material so as to pre-pressurize the material, discharge a large amount of air between the material, increase the compaction degree of the material fed into the roller press, and facilitate the roller press to promote the working efficiency. In order to improve the extrusion strength of the material between the reinforced pressure roller 35 and the inner wall of the box, a plurality of pressure bearing plates 393 are arranged on the outer side of the inner wall of the box for extruding the material, and a pressure bearing plate support 394 is arranged below the pressure bearing plates 393.

Preferably, the pressing roller 35 is driven by the pre-pressing variable frequency motor 31 to rotate around the roller shaft 352, the rotation direction of the roller surface is consistent with the movement direction of the material, the linear speed of the roller surface can be adjusted steplessly, and the pressing roller 35 continuously presses and exhausts the material passing through between the pressing roller 35 and the bearing plate 393 under the thrust action of the electro-hydraulic push rods 381 at two sides of the roller shaft 352, so that the pre-pressing of the material is realized, and the working efficiency of the roller press is improved; the travel of the electro-hydraulic push rods 381 on two sides of the roll shaft 352 can be independently adjusted, and the material throughput on two sides of the roll gap is adjusted while the material is pre-pressurized, so that the distribution condition of the material during descending is adjusted, and the phenomenon of deflection caused by uneven distribution of the material falling into the roll squeezer is prevented.

Preferably, as shown in fig. 9, a waist-shaped hole in the horizontal direction is formed at the connection position of the end of the box 39 and the end of the roll shaft 352, and the roll shaft can horizontally move or rotate in the waist-shaped hole, so that the bearing seat and the pressing roll are driven to horizontally move or rotate, and the pressing roll 35 can conveniently adjust the front and back strokes according to the amount of materials. A material return hole 391 is arranged on the box body below the waist-shaped hole, and the material falling from the waist-shaped hole returns to the material pre-pressurizing device 3 through the material return hole 391; the limiting plate 392 is located at one side of the pressing roller 35 away from the pressing mechanism 38, and is used for limiting the passing range of the pre-pressed material; the exhaust port 395 is arranged beside the feed inlet 397 above the pressure roller 35 and is connected with dust collecting equipment in the grinding system, and redundant gas is exhausted from the exhaust port 395.

Preferably, the bottom of one side of the pressing roller far away from the pressing mechanism is provided with a vertical limiting plate 392, the limiting plate 392 extends downwards to the discharge hole 8, a feeding space right below the pressing channel is formed between the limiting plate 392 and the inner wall of the box body, and the feeding space is suitable for the size of the pre-pressed material so as to ensure that the material is not deformed and loosened before being conveyed to the discharge hole 8. The material after pre-pressurization enters a roller press through a discharge hole 8 for pressurization.

Further preferably, the bottom plate 396 is obliquely arranged right below the pressing roller, a gap exists between the material limiting plate 392 and the bottom plate 396, and the material passing through the gaps between the pressing roller 35 and the two side boxes passes through the gap again to be mixed with the pre-pressed material and discharged out of the bin together through the discharge hole 8.

Further preferably, the width of the discharge hole is larger than the width between the material limiting plate 39 and the inner wall of the box body, so that the material after pre-pressurization can smoothly enter the roller press through the discharge hole 8.

Further preferably, the stroke of the electro-hydraulic push rod 381 of the pressurizing mechanism can be finely adjusted to adjust the pre-pressurizing strength, and meanwhile, the rotating speed of the pre-pressurizing variable frequency motor 31 is adjusted, so that the blanking section is reduced, the material falling speed is accelerated, and the feeding requirement of the roller press is met.

As shown in fig. 10 and 11, the material pre-pressurizing device 3 has a roll gap automatic deviation rectifying function, when the roll press stabilizing bin works, a roll gap online measuring sensor (not shown in the figure) of the roll press is utilized to calculate roll gap deviation of the roll press in real time, and data signals of the deviation are transmitted to a controller, and the controller controls stroke adjustment of an electro-hydraulic push rod through calculation; when the roll gap deviation at the two ends of the roll squeezer (not shown in the figure) exceeds the upper limit value allowed by normal operation, the electro-hydraulic push rods 381 adjust respective pushing strokes according to instructions sent by the controller, so that the feeding quantity of the roll squeezer at the side with the larger roll gap is forcedly reduced, the feeding quantity of the roll squeezer at the side with the smaller roll gap is increased, and when the roll gap deviation is recovered to be normal, the electro-hydraulic push rods 381 at the two sides automatically recover to adjust the front strokes, so that the intelligent automatic correction of the roll gap of the roll squeezer is realized.

Specifically, setting the upper limit of a roll gap deviation value (absolute value of left and right roll gap differences of a roll press) as amm; when the roll gap deviation value is smaller than a, the strokes of the two electro-hydraulic push rods of the material pre-pressurizing device are identical to each other and are bmm, and at the moment, only the material is pre-pressurized; when the roll gap deviation value is larger than a, if the roll gap at the left side of the roll press is larger than the roll gap at the right side, the travel of the electro-hydraulic push rod at the left side of the material pre-pressurizing device is increased by cmm, and the travel of the electro-hydraulic push rod at the right side is reduced by d mm; if the left side roll gap of the roll squeezer is smaller than the right side roll gap, the travel of the electro-hydraulic push rod at the right side of the pre-pressurizing device is increased by cmm, the travel of the hydraulic push rod at the left side is reduced by d mm, and when the roll gap deviation value is smaller than a, the travel of the electro-hydraulic push rod at the left side and the right side is restored to bmm.

The invention also discloses a working method of the material pre-pressurizing stabilizing bin with the automatic deviation correcting function, which comprises the following steps:

S1, uniformly dropping a material to be ground into a rotary multi-channel material distribution device 2 through a feeding rumen 4 and a distributing chute 5 and 4 in sequence, and then feeding the material to the horizontal section in a stabilizing bin of a roller press under the action of gravity;

S2, when materials enter the box body from a feed opening 397 above the pressure roller 35 and then contact the pressure roller 35, the pressure roller 35 continuously meshes the materials between the pressure roller 35 and the inner wall of the box body by utilizing the friction force between the roller surface and the materials, the materials are pre-pressurized, a large amount of air between the materials is discharged, the compactness of the materials fed into the roller press is improved, and the roller press is beneficial to improving the working efficiency; the materials falling from the roll shaft holes of the box body are returned to the material pre-pressurizing device 3 through the material return holes 391;

S3, the limiting plate 392 is positioned on one side of the pressing roller 35 far away from the pressing mechanism 38 and is used for limiting the passing range of the pre-pressed material and ensuring that the pre-pressed material is complete and not loose; the exhaust port 395 is arranged beside the inlet above the pressure roller 35 and is connected with dust collecting equipment in the grinding system, and redundant gas is exhausted from the exhaust port 395;

s4, adjusting the pre-pressurizing strength through the stroke of the electro-hydraulic push rod 381 of the fine-adjusting pressurizing mechanism, and simultaneously adjusting the rotating speed of the pre-pressurizing variable frequency motor 31, so that the material falling speed is accelerated while the blanking section is reduced, and the feeding requirement of the roller press is met;

When the roll gap stabilizing bin of the roll press works, roll gap deviation of the roll press is calculated in real time by utilizing a roll gap online measuring sensor of the roll press, when the roll gap deviation at two ends of the roll press exceeds an upper limit value allowed by normal operation, electro-hydraulic push rods 381 at two sides of a material pre-pressurizing device 3 automatically adjust respective push rod strokes according to signals, the roll press feeding quantity at one side with a larger roll gap is forcedly reduced, the roll press feeding quantity at one side with a smaller roll gap is increased, after the roll gap deviation is recovered to be normal, electro-hydraulic push rods 381 at two sides automatically recover to adjust the front strokes, and intelligent automatic correction of the roll gap of the roll press is realized.

The stabilizing bin can be automatically adjusted when the roll gap deviation of the roll squeezer is large, so that the working efficiency of the roll squeezer is improved.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (13)

1. A material pre-pressurizing device with automatic deviation correcting function is characterized in that: the material pre-pressurizing device is arranged between the bottom of the stabilizing bin and the roller press and is used for feeding the materials from the stabilizing bin into the roller press after extrusion and exhaust;

the outer side of the material pre-pressurizing device is provided with a box body; the box body is provided with a feed inlet communicated with the stable bin body, and the feed inlet is positioned right above an extrusion channel formed by the pressure roller and the inner wall of the box body; the material pre-pressurizing device comprises a pre-pressurizing power structure, a pressurizing roller and a pressurizing mechanism; the pre-pressurizing power structure is used for driving the pressurizing roller to rotate; the pressing mechanism is arranged at one side of the pressing roller far away from the feeding hole and is used for providing horizontal pressure towards the inner wall of the box body for the pressing roller; the pressing roller continuously engages the material into a pressing passage formed between the pressing roller and the inner wall of the case under the pressure provided by the pressing mechanism to pre-press the material.

2. The material pre-pressurizing device with automatic deviation rectifying function as set forth in claim 1, wherein: the pre-pressurizing power structure comprises a pre-pressurizing variable frequency motor and a pre-pressurizing speed reducer which are matched; the pressing roller comprises a roller sleeve and a roller shaft which are sleeved together, two ends of the roller shaft are fixed in bearing seats on two sides of the roller sleeve, one end, close to the pre-pressurizing variable frequency motor, of the roller shaft is connected with a pre-pressurizing speed reducer, and the pre-pressurizing variable frequency motor is connected with the pre-pressurizing speed reducer through a universal coupling; the pre-pressurizing speed reducer is connected with the hinged support of the torque force supporting mechanism of the speed reducer through a connecting rod.

3. The material pre-pressurizing device with automatic deviation correcting function as claimed in claim 2, wherein: the pressurizing mechanism comprises an electrohydraulic push rod perpendicular to the roll shaft, an oil pipe and an electrohydraulic push rod hinged support; the electrohydraulic push rod hinged support is fixed on the bearing seat, one end of the electrohydraulic push rod is horizontally fixed on the bearing frame, and the other end of the electrohydraulic push rod is movably connected with the electrohydraulic push rod hinged support and is opposite to the roll shaft; the oil pipe is connected to the interface of the pressurizing mechanism in a threaded manner; a guide key vertically arranged is connected below the bearing seat, and a guide groove matched with the guide key is arranged on the bearing frame; the guide key comprises a guide rod fixed in the bearing seat and a disc type guide seat fixed at the bottom of the guide rod, and the guide seat moves or rotates in a straight line in the guide groove so as to drive the guide rod and the bearing seat to move or rotate.

4. The material pre-pressurizing device with automatic deviation rectifying function as set forth in claim 1, wherein: a plurality of bearing plates are arranged on the outer side of the inner wall of the box body for extruding materials, and bearing plate supports are arranged below the bearing plates.

5. The material pre-pressurizing device with automatic deviation correcting function as claimed in claim 2, wherein: the box body is connected with the end part of the roll shaft, a waist-shaped hole is formed in the connecting part, and the roll shaft can horizontally move or rotate in the waist-shaped hole, so that the bearing seat and the pressing roll are driven to horizontally move or rotate; the box body below the waist-shaped hole is provided with a return hole, and materials falling out of the waist-shaped hole return to the material pre-pressurizing device through the return hole.

6. The material pre-pressurizing device with automatic deviation rectifying function as set forth in claim 1, wherein: the bottom of one side of the pressing roller, which is far away from the pressing mechanism, is provided with a vertical limiting plate, the limiting plate extends downwards to the discharge hole, a feeding space right below the pressing channel is formed between the limiting plate and the inner wall of the box body, the feeding space is suitable for the size of the pre-pressed material, and the pre-pressed material enters the roller press through the discharge hole to be pressed.

7. The material pre-pressurizing device with automatic deviation rectifying function as set forth in claim 6, wherein: the width of the discharge hole is larger than the width between the material limiting plate and the inner wall of the box body.

8. The material pre-pressurizing device with automatic deviation rectifying function as set forth in claim 6, wherein: the bottom plate is obliquely arranged right below the pressing roller, a gap exists between the material limiting plate and the bottom plate, and materials passing through gaps between the pressing roller and the box bodies on two sides and above the pressing roller are mixed with the pre-pressed materials again through the gap and discharged out of the bin together through the discharge hole.

9. A steady feed bin which characterized in that: a material pre-pressurizing device with an automatic deviation rectifying function according to any one of claims 1 to 8.

10. The working method of the material pre-pressurizing device with the automatic deviation rectifying function according to any one of claims 1 to 8, wherein the working method comprises the following steps: the method comprises the following steps:

S1, uniformly dropping the materials to be ground into the horizontal section of the stabilizing bin;

S2, when the material enters the box body from a feed inlet above the pressing roller and contacts the pressing roller, the pressing roller continuously engages the material between the pressing roller and the inner wall of the box body by utilizing the friction force between the roller surface and the material, the material is pre-pressed, and a large amount of air between the materials is discharged;

S3, adjusting the pre-pressurizing strength by adjusting the stroke of the electro-hydraulic push rod of the pressurizing mechanism, and simultaneously adjusting the rotating speed of the pre-pressurizing variable frequency motor to adjust the falling speed of the material;

And S4, when the roller press stabilizing bin works, the roller press roller gap deviation is calculated in real time by utilizing a roller press roller gap online measuring sensor, a data signal of the deviation is transmitted to the controller, and the controller controls the propelling stroke of the electro-hydraulic push rod through calculation.

11. The method for operating a material pre-pressurizing device with an automatic deviation rectifying function according to claim 10, wherein: the material pre-pressurizing device has the automatic roll gap correcting function: when the roll squeezer stabilizing bin works, roll squeezer roll gap deviation is calculated in real time by using a roll squeezer roll gap online measurement sensor, a data signal of the deviation is transmitted to the controller, and the controller controls the propelling stroke of the electro-hydraulic push rod through calculation.

12. The method for operating a material pre-pressurizing device with an automatic deviation rectifying function according to claim 11, wherein: when the roll gap deviation at the two ends of the roll squeezer exceeds the upper limit value allowed by normal operation, the electro-hydraulic push rods automatically adjust the stroke of the push rods according to the command sent by the controller, the feeding quantity of the roll squeezer at the side with the larger roll gap is forcedly reduced, the feeding quantity of the roll squeezer at the side with the smaller roll gap is increased, and when the roll gap deviation is recovered to be normal, the electro-hydraulic push rods at the two sides automatically recover to adjust the front stroke.

13. The method for operating a material pre-pressurizing device with an automatic deviation rectifying function according to claim 12, wherein: setting the upper limit of the absolute value of the roll gap difference between the left roll and the right roll of the roll squeezer as amm; when the roll gap deviation value is smaller than a, the strokes of the two electro-hydraulic push rods are consistent, and the strokes of the left electro-hydraulic push rod and the right electro-hydraulic push rod are bmm; when the roll gap deviation value is larger than a, if the roll gap at the left side of the roll press is larger than the roll gap at the right side, the travel of the electro-hydraulic push rod at the left side of the pre-pressurizing device is increased by cmm, and the travel of the electro-hydraulic push rod at the right side is reduced by d mm; if the left side roll gap of the roll squeezer is smaller than the right side roll gap, the travel of the right side electro-hydraulic push rod of the material pre-pressurizing device is increased by cmm, the travel of the left side hydraulic push rod is reduced by d mm, and when the roll gap deviation value is smaller than a, the travel of the left and right electro-hydraulic push rods is restored to bmm.